Alert archive / Mississippi / Tornado Warnings in 1998

Tornado Warning 27, NWS New Orleans, LA

September 20, 1998Pearl River County, Mississippi

NWS New Orleans, LA issued this tornado warning at Sep 20, 1998, 11:46 AM CDT for Pearl River County, Mississippi. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Sep 20, 1998, 11:46 AM CDT (16:46 UTC)
Expired
Sep 20, 1998, 12:35 PM CDT
In force
49 min
Issued by
NWS New Orleans, LA
Area
Whole counties

County Pearl River County, MS

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 4.8 hours before the alert went out and 59 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Slidell Radar S, LA at 12:00Z on 1998-09-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 92 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 12:00Z on 1998-09-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 31 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
92 J/kg
Mixed-layer CIN
-123 J/kg
Mixed-layer LCL
782 m above ground
0-6 km bulk shear
1 kt
0-1 km storm-relative helicity
31 m²/s²
0-3 km storm-relative helicity
96 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KNEW 201645 RRA
TORNEW
MSC109-201735-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1146 AM CDT SUN SEP 20 1998

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS LA HAS ISSUED A...

* TORNADO WARNING FOR
   - PEARL RIVER COUNTY IN SOUTHERN MISSISSIPPI

* UNTIL 1235 PM CDT

* AT 1142 AM NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM WITH A POSSIBLE TORNADO ABOUT 8 MILES WEST OF
POPLARVILE. THE THUNDERSTORM AND ASSOCIATED TORNADO WAS MOVING EAST
NORTHEAST AROUND 15 MPH.

COMMUNITIES IN THE PATH OF THIS TORNADO INCLUDE WHITE SAND...
POPLARDVILLE AND HILLSDALE.

IF YOU ARE IN THESE AREAS...SEEK SHELTER IN A SMALL INTERIOR ROOM
AWAY FROM WINDOWS

IF YOzU ARE IN THE PATH OF A TORNADO...GET UNDER A WORKBENCH OR PIECE
OF STURDY FURNITURE. SEEK SHELTER IN AN INTERIOR ROOM SUCH AS A
CLOSET ON THE LOWEST FLOOR.  USE BLANKETS...PILLOWS...OR CUSHIONS TO
COVER YOUR BODY.  AVOID WINDOWS.

What forecasters said that day

The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Sep 20, 10:30 AM CDT, 1 hour 16 minutes before
LAZ034>040-046>050-056>070-MSZ068>071-077-080>082-211630-

THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1030 AM CDT SUN SEP 20 1998

TROPICAL DEPRESSION HERMINE WILL CONTINUE TO MOVE NORTHEAST AND
WEAKENING. HERMINE IS EXPECTED TO DISSIPATE TONIGHT OVER NORTHERN
MISSISSIPPI AND ALABAMA BORDER. THE REMNANTS OF HERMINE WILL
CONTINUE TO AFFECT LOCAL REGION THROUGH THIS SUNDAY EVENING WITH
SHOWERS AND THUNDERSTORMS.

PERSISTING TROPICAL MOISTURES WITH WARM UNSTABLE AIRMASS WILL CAUSE
SCATTERED THUNDERSTORMS MOSTLY NORTHEAST OF LINE FROM EAST FELICIANA
PARISH SOUTHEAST TO ST TAMMANY PARISH INCLUDING SOUTHWEST AND
COASTAL MISSISSIPPI REGIONS. FEW OF THESE THUNDERSTORMS POSSIBLY
REACH SEVERE LIMITS DURING THIS SUNDAY AFTERNOON.
Special weather statement, Sep 20, 10:30 AM CDT, 1 hour 16 minutes before
LAZ034>040-046>050-056>070-MSZ068>071-077-080>082-211630-

THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1030 AM CDT SUN SEP 20 1998

TROPICAL DEPRESSION HERMINE WILL CONTINUE TO MOVE NORTHEAST AND
WEAKENING. HERMINE IS EXPECTED TO DISSIPATE TONIGHT OVER NORTHERN
MISSISSIPPI AND ALABAMA BORDER. THE REMNANTS OF HERMINE WILL
CONTINUE TO AFFECT LOCAL REGION THROUGH THIS SUNDAY EVENING WITH
SHOWERS AND THUNDERSTORMS.

PERSISTING TROPICAL MOISTURES WITH WARM UNSTABLE AIRMASS WILL CAUSE
SCATTERED THUNDERSTORMS MOSTLY NORTHEAST OF LINE FROM EAST FELICIANA
PARISH SOUTHEAST TO ST TAMMANY PARISH INCLUDING SOUTHWEST AND
COASTAL MISSISSIPPI REGIONS. FEW OF THESE THUNDERSTORMS POSSIBLY
REACH SEVERE LIMITS DURING THIS SUNDAY AFTERNOON.

The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 20, 9:05 AM CDTTornado WarningLIXPearl River45 min
Sep 20, 9:54 AM CDTTornado WarningLIXHancock, Harrison46 min
Sep 20, 10:23 AM CDTSevere Thunderstorm WarningLIXWalthall62 min
Sep 20, 10:30 AM CDTFlash Flood WarningLIXWalthall2 hr

Nearby

Tornado Warnings in Mississippi, 1998Every tornado warning in 1998Tornadoes in 1998

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.